package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //前端提交的密码进行MD5加密后再赋给原先传进来的password ---再跟数据库中密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());//转成byte
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象（谁调用他，就返回给谁）
        return employee;
    }

    /**
     *新增员工
     * @param employeeDTO
     * @return
     */
    public void save(EmployeeDTO employeeDTO) {
        //传给持久层用实体类
        Employee employee=new Employee();

        //  设置属性：
        //属性拷贝（DTO和实体类属性名一致）
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置实体类不包括的DTO中的属性
        //状态:1
        employee.setStatus(StatusConstant.ENABLE);
        //密码：md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //当前记录创建和修改时间
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());
        //当前登录用户的ID          //当前登录用户的ID
        //把存储空间里的id取出来
        //employee.setCreateUser(BaseContext.getCurrentId());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        //传给持久层数据
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO){
        //select * from employee limit 0-10
        //pageHelper工具  通过threadLocal把查询到的总页码和记录数存储在线程里，取出来拼limit关键字
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        //按照pageHelper插件要求将查询结果放在里面
        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);
        //返回 PageResult
        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);
    }
    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     * @return
     */
    public void startOrStop(Integer status, Long id){
        //为了增加update的通用性，也让他可以修改除status外的其他字段
        //update employee set status = ? where id = ?
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);

        employeeMapper.update(employee);
    }

    /**
     * 根据id查员工信息
     * @param id
     * @return
     */
    public Employee getById(Long id){
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");//回显也看不到密码
        return employee;
    }
    /**
     * 编辑员工信息
     * @param employeeDTO
     * @return
     */
    public void update(EmployeeDTO employeeDTO){
        //mapper层parameterType="Employee；所以要属性拷贝成Employee
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置修改人和修改时间
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

}
